JP7094609B2 - Road surface cutting device and road surface cutting method - Google Patents

Description

The present invention relates to a road surface cutting device and a road surface cutting method.

In order to replace the old manhole cover and receiving frame, the road surface around the manhole is cut and removed, replaced with a new manhole cover and receiving frame, and then the road surface around the manhole is filled with a filler. ..

Patent Document 1 describes a road surface cutter 100 on which a curved blade 101 is mounted and a tilting means for tilting a cover for accommodating the road surface cutter 100 up and down with respect to the road surface. The road surface cutter 100 can cut the road surface by tilting the blade 101 rotated by the motor toward the road surface.

Japanese Unexamined Patent Publication No. 2014-5601

However, a method for effectively sucking dust generated when cutting a road surface such as asphalt is under development.

When the inventors of the present application conducted an experiment in which a suction means was connected to the cover of the blade to suck dust generated by cutting, if the road surface was uneven, a large gap was created between the cover and the road surface. Therefore, dust may be scattered to the outside.

On the other hand, if the road surface is cut while supplying a large amount of water, it is possible to prevent the dust from being scattered into the atmosphere, but since a large amount of polluted water mixed with dust flows out to the surroundings, the polluted water in the vacuum Suction work and cleaning are required. However, it was also found that if the amount of water is small, the water is only locally supplied, and therefore dust cannot be effectively sucked.

Therefore, an object of the present invention is to provide a road surface cutting device and a road surface cutting method capable of effectively sucking dust generated when cutting a road surface.

The road surface cutting device according to one aspect of the present invention is a road surface cutting device that cuts a road surface by rotating a circular blade. Then, a cover for providing a space for accommodating at least a part of the blade during cutting of the road surface between the road surface, a spraying means for spraying the liquid into the space, and a suction means for sucking the space. And prepare.

According to this aspect, a cover for accommodating at least a part of the blade in the space provided between the road surface and the road surface during cutting of the road surface, a spraying means for spraying the liquid into the space, and a space for sucking the space. Since the suction means is provided, it is possible to suppress the sprinkling of dust without requiring a large amount of water and to effectively suck the dust. In addition, the blade can be cooled with a sprayed liquid.

Here, "fog" means a state in which a large number of small liquid particles are floating in the air. However, the liquid is not limited to pure water, and may be an aqueous solution such as tap water or a chemical solution. Further, a liquid that is not mist may be supplied together with the mist.

Further, the blade includes a front surface and a back surface composed of a curved surface, and a plurality of outer peripheral blades provided on the side surface connecting the front surface and the back surface, and the spraying means is configured to supply mist toward the side surface of the blade. May be. Further, it may be a disk blade whose front surface and back surface are flat.

According to this aspect, the spraying means supplies the mist toward the side surface of the blade, so that the mist can be supplied to both the front surface side and the back surface side of the blade. As a result, water flows into both sides of the cutting groove as the blade rotates, so that dust can be effectively suppressed from being scattered.

Here, the "curved surface" of the "blade" means that the cross section including the rotation axis of the blade includes a curved line. The curve includes, for example, a high-order curve such as an arc or a parabola, but may be partially straight. If the cross section including the axis of rotation of the blade is an arc, the curved surface of the blade includes a spherical surface.

Further, the cover may be provided with a frame portion facing the road surface and a side surface portion connected to the frame portion and capable of expanding and contracting in a direction perpendicular to the road surface while the road surface is being cut by the blade.

According to this aspect, the gap between the cover and the road surface can be reduced even if the road surface is uneven due to the weight of the frame portion and the elasticity of the side surface portion. Therefore, it is possible to prevent dust from being scattered on the outside of the cover.

Here, the “connection” is not limited to the case of being directly connected, but also includes the case of being indirectly connected with another object intervening between them.

Further, the road surface cutting device according to one aspect of the present invention cuts the road surface by rotating a circular blade. Then, a cover for providing a space for accommodating a part of the blade during cutting of the road surface between the road surface and a spraying means for spraying the liquid into the space is provided, and the cover is provided with a space. An opening is provided that is connected to the suction means for suction.

According to this aspect, by connecting the suction means to the opening, it is possible to suppress the sprinkling of dust without requiring a large amount of water, and it is possible to effectively suck the dust.

Further, the road surface cutting method according to one aspect of the present invention is a road surface cutting method for cutting a road surface by rotating a circular blade. Then, with a part of the blade housed in the space provided between the cover and the road surface, the step of spraying the liquid into the space and rotating the blade while sucking to cut the road surface. include.

According to this aspect, since the liquid is sprayed into the space inside the cover and the blade is rotated to cut the road surface while sucking, the dust is suppressed from being scattered without requiring a large amount of water, and the dust is dusted. Can be effectively sucked.

According to the present invention, it is possible to provide a road surface cutting device and a road surface cutting method capable of effectively sucking dust.

Perspective view of the road surface cutting device 10 according to the first embodiment Side view of the blade cover 14 according to the first embodiment Perspective view of the blade 12 according to the first embodiment

[First Embodiment]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same elements are designated by the same reference numerals, and duplicate description will be omitted. Further, the following embodiments are examples for explaining the present invention, and the present invention is not intended to be limited only to the embodiments thereof. Further, the present invention can be modified in various ways as long as it does not deviate from the gist thereof.

1 is a perspective view of the road surface cutting device 10 according to the present embodiment, FIG. 2 is a side view of a blade cover 14 (an example of a “cover”), and FIG. 3 is a blade for cutting the road surface. 12 is a perspective view.

The road surface cutting device 10 includes a blade cover 14 for accommodating the blade 12 (FIG. 3), a spraying means 16 for spraying a liquid into the space inside the blade cover 14 to supply mist, and the inside of the blade cover 14. A suction means 18 for sucking the space of the above is provided.

The spraying means 16 includes a tube 16A for sucking water from the tank, a pump 16B for sucking water from the tank through the tube 16A and discharging it at low pressure or high pressure, and a tube 16C for discharging water from the pump 16B. It is provided with a nozzle 16D that atomizes water that has passed through the tube 16C and supplies it into the blade cover 14. The nozzle 16D supplies a mist-like liquid into the blade cover 14 by discharging low-pressure or high-pressure water from a plurality of holes having a small cross-sectional area. The mounting position of the nozzle 16D will be described later.

As shown in FIGS. 1 and 2, the blade cover 14 has a semi-cylindrical main body portion 14A and a plate-shaped fringe portion 14B provided so as to extend in the horizontal direction parallel to the road surface from the lower end of the main body portion 14A. A bellows 14C (an example of a "stretchable portion") that is connected to the outer edge of the fringe portion 14B and expands and contracts in a direction perpendicular to the road surface, and a rectangular frame-shaped stabilizing portion 14D ("frame") that is connected to the lower end of the bellows 14C. (Example)), four shafts 14E1 to 14E4 fixed to the four corners of the stabilizing portion 14D and provided in the direction perpendicular to the road surface, and the suction means 18 for sucking dust in the blade cover 14. It is provided with a connection portion 14F.

The main body portion 14A includes two substantially semicircular side surfaces and an upper surface forming a cylindrical surface connecting these two side surfaces. The main body portion 14A is provided slightly larger than the blade 12 so that the blade 12 can be housed inside, and is formed so as to have a radius 10 to 50 mm larger than the radius in the side view of the blade 12, for example. .. The main body portion 14A and the fringe portion 14B can be provided with resin, metal, or the like. In the present embodiment, the main body portion 14A and the fringe portion 14B are provided with a metal having a higher soundproofing effect.

The bellows 14C is made of cloth, metal, plastic, or the like, and can be expanded and contracted in a direction perpendicular to the road surface by having a structure in which mountain folds and valley folds are repeated. Further, the stabilizing portion 14D connected to the lower end of the bellows 14C is provided from wood or metal having a sufficient weight to pull the lower end of the bellows 14C in the road surface direction.

Further, as shown in FIG. 1, through holes are formed in the four corners of the fringe portion 14B. The shafts 14E1 to 14E4 regulate the fringe portion 14B and the main body portion 14A integrally formed with the stable portion 14D from moving in the horizontal direction by penetrating each through hole, respectively, and the bellows 14C. It has a function to guide the expansion and contraction direction of. Further, since the tops of the shafts 14E1 to 14E4 are formed to be larger than the hole diameter of the through holes, the main body portion 14A is configured so as not to be separated from the stable portion 14D beyond the height of the shafts 14E1 to 14E4. ing.

Further, the blade cover 14 is provided with a support portion for rotatably supporting the blade 12 with the rotation shaft AX. A motor is connected to this support portion, and the blade 12 can be rotated in the direction of the arrow AR (FIG. 2) about the rotation axis AX.

As shown in FIG. 2, in the present embodiment, the nozzle 16D is installed on the side surface forming the cylindrical surface of the main body portion 14A of the blade cover 14 so as to face the rotation axis AX direction. The blade 12 cuts the road surface by moving in the right or left direction of the drawing while rotating in the direction of the arrow AR about the rotation axis AX.

In the present embodiment, the nozzle 16D is at a position of about 120 degrees (a position of about 60 degrees at an elevation angle) when the angle at which the blade 12 comes out from the road surface to the ground is 0 degrees with respect to the rotation axis AX. The rotation axis AX is provided so as to face diagonally downward.

Since the nozzle 16D is provided in the upper half region of the blade cover 14 (in this embodiment, a position of about 85% of the height of the blade cover 14), the fog is supplied to a wide region of the space in the blade cover 14. be able to. Further, since the fog is supplied to the blade 12 that will invade the road surface from now on, it may be expected that the sharpness of the blade 12 will be improved.

However, the present invention is not limited to this, and for example, the nozzle 16D may be installed so as to face directly below the rotation axis AX from a position of 90 degrees directly above the rotation axis AX. Alternatively, the nozzle 16D may be provided so as to face horizontally or diagonally upward from the region of the lower half of the blade cover 14. Further, a plurality of nozzles may be provided.

Further, regarding the position of the nozzle 16D in the rotation axis AX direction, it is preferable that the nozzle 16D is installed at a position facing the side surface where the outer peripheral blade of the blade 12 is provided. This makes it possible to supply fog to both the front surface and the back surface of the blade 12.

As will be described later, in the present embodiment, the blade 12 has a spherical curved surface. Therefore, the closer to the outer circumference away from the center of the blade 12, the more the position in the rotation axis AX direction advances. Therefore, in the present embodiment, the nozzle 16D is provided at a position separated from the center in the rotation axis AX direction of the side surface forming the cylindrical surface of the main body portion 14A.

As a result of the above configuration, the mist is supplied toward the center of the blade 12 from the nozzle 16D provided at a position about 10 to 50 mm away from the side surface where the outer peripheral blade of the blade 12 is provided.

Further, the blade cover 14 includes a connection portion 14F for sucking dust in the blade cover 14 by the suction means 18.

As shown in FIG. 2, since the blade 12 rotates in the direction of the arrow AR about the rotation axis AX, the connection portion 14F is provided at a position where the blade 12 comes out from the road surface to the ground. ing. The connection portion 14F is provided with an opening that communicates with the space inside the blade cover 14 and faces upward. Therefore, by sucking from this opening, it is possible to effectively suck the dust scattered on the ground with the rotation of the blade 12.

Further, the opening of the connecting portion 14F and the nozzle 16D are provided in different regions when the space in the blade cover 14 is divided into two by a plane perpendicular to the road surface including the rotation axis AX (in FIG. 2, the nozzle 16D). Is provided on the left side of the rotating shaft AX, and the opening of the connecting portion 14F is provided on the right side of the rotating shaft AX). Therefore, it is possible to prevent the mist supplied from the nozzle 16D from being sucked into the space inside the blade cover 14 without being diffused.

However, the present invention is not limited to this, and for example, the nozzle 16D may be provided in the center and a plurality of openings may be provided at the ends so as to promote the diffusion of fog.

As shown in FIG. 1, the connecting portion 14F is connected to the suction means 18. The suction means 18 includes a tube 18A communicating with the opening of the connecting portion 14F, a separating means 18B communicating with the other end of the tube 18A (an example of the “centrifugal separating portion”), and a collection provided below the separating means 18B. It includes a dust box 18C, a tube 18D provided above the separating means 18B, and a pump 18E connected to the tube 18D.

By the pump 18E, the polluted water containing dust in the blade cover 14 flows into the separating means 18B through the tube 18A. The separation means 18B is for separating polluted water by the principle of a cyclone that separates by centrifugal force, and has a side surface portion having a circular horizontal cross section whose area gradually decreases downward, and on this side surface. Of the polluted water that rotates along the line, the one that descends due to centrifugal separation due to its heavy weight is discharged to the dust collection box 18C through an opening provided at the connection portion with the dust collection box 18C (“downward”). An example of an "opening") and an opening provided in the dust collecting box 18C for discharging gas or fine particles that were not discharged from above (an example of an "upper opening") are formed. The upper opening communicates with the tube 18D and the other end of the tube 18D communicates with the pump 18E. However, it is also possible to use a suction method other than the cyclone type. For example, a vacuum cleaner such as a double motor type may be connected to the blade cover 14 with a hose to directly absorb dust.

FIG. 3 shows the blade 12. The blade 12 is formed in a circular shape, and is intended to cut the road surface into a circle by turning around the rotation axis AX2 while rotating itself around the rotation axis AX. The blade 12 includes a front surface 12A and a back surface 12B forming a spherical or curved surface, and a side surface 12C on which a plurality of outer peripheral blades are formed. The blade 12 is mainly composed of copper in which a diamond chip is embedded. Various diameters of the blade 12 can be applied depending on the application and the like, and for example, the blade 12 has a radius of 250 mm in a side view. Further, as the blade, a disk-shaped blade for linearly cutting the road surface may be used.

Further, the road surface cutting device 10 includes a motor for rotating the blade 12, wheels for moving the blade 12 and the blade cover 14, tilting means for tilting the blade 12 and the blade cover 14 up and down with respect to the road surface, and the like. It is equipped with.

Hereinafter, a road surface cutting method for cutting the iron lid and the outer frame of a manhole requiring repair on a circular spherical surface together with the surrounding pavement by using such a road surface cutting device 10 will be described.

First, a center jig for engaging the road surface cutting device 10 is fixed to the center of the target manhole, and the center jig and the center portion of the road surface cutting device 10 are engaged with each other.

Then, while the blade cover 14 and the blade 12 whose upper portion is housed in the blade cover 14 are lowered in the road surface direction by using a tilting means, the blade 12 is rotated about the rotation axis AX to start cutting the road surface. do.

At this time, the lower part 100 mm to 200 mm of the blade 12 is submerged under the road surface, and the rest is on the road surface. Further, the stabilizing portion 14D, which is the lower end of the blade cover 14, faces the road surface at a distance of several millimeters from the road surface. Further, the upper half of the blade cover 14 is housed in the space inside the main body 14A, and the lower half of the blade cover 14 on the road surface is housed in the space surrounded by the bellows 14C. Therefore, the portion of the blade 12 above the road surface is housed in the space surrounded by the blade cover 14 and the road surface. Therefore, it is possible to suppress the leakage of noise such as high-frequency noise generated when the road surface is cut to the outside.

At the same time, the low-pressure or high-pressure water supplied from the pump 16B to the nozzle 16D passes through a plurality of holes provided in the nozzle 16D, becomes mist, and is supplied into the main body 14A of the blade cover 14. Since the nozzle 16D faces the side surface 12C of the blade 12, a part of the mist ejected from the nozzle 16D adheres to both the front surface 12A and the back surface 12B of the blade 12, and the cooling of the blade 12 is promoted. , Suppresses the decrease in sharpness. The means for spraying is not limited to this.

Further, since the mist adheres to the front surface 12A and the back surface 12B of the blade 12, water enters both sides of the cutting groove. Such water is absorbed by dust such as asphalt powder and aggregate powder generated by cutting and becomes moist particles, so that the dust is suppressed from being scattered. Therefore, it is possible to prevent dry dust and the like from scattering into the atmosphere and reaching the living environment.

The pump 18E sucks wet dust and the like from the opening provided in the connection portion 14F of the blade cover 14. The sucked dust or the like descends while rotating along the side surface portion of the separating means 18B, and is discharged to the dust collecting box 18C from the opening provided below. Therefore, dust and the like generated by cutting can be efficiently collected and discarded. The unrecovered gas and fine particles are sucked into the pump 18E through the tube 18D through the opening provided above.

Then, the road surface cutting device 10 is centered on the rotation shaft AX2 passing through the center of the manhole while engaging with a center jig having a shaft portion fixed to the center of the manhole and standing vertically from the center of the manhole. Turn. Along with this, the blade cover 14 and the blade 12 also rotate around the manhole.

At this time, even if the road surface has irregularities or height differences, since the bellows 14C is provided, the stabilizing portion 14D can be tilted according to the road surface. Therefore, the gap with the road surface can be suppressed. Further, since the shafts 14E1 to 14E4 regulate the fringe portion 14B and the main body portion 14A integrally formed with the stable portion 14D from moving in the horizontal direction, the bellows 14C expands and contracts smoothly and flexibly. It becomes possible to do.

By turning around the center of the manhole several times, the iron lid and outer frame of the manhole can be cut on a circular spherical surface together with the surrounding pavement. After that, the cut mass is separated, lifted and removed, and then a new manhole is installed and the surrounding area is filled with mortar or the like to complete the repair of the manhole.

As described above, since the mist is supplied from the nozzle 16D into the blade cover 14, it is possible to evenly supply water to the front surface and the back surface of the blade 12 as compared with the case where water is supplied. As a result, it is possible to prevent the dust from being scattered. However, the mist may be supplied only to the front surface or the back surface of the blade 12. Further, the fog may be supplied by using a plurality of nozzles.

Further, since the blade 12 sucks the dust or the like from the position where the blade 12 comes out from the road surface, it is possible to suppress the diffusion of the dust or the like. However, dust or the like may be sucked from different positions.

Further, since the separated means 18B is used to centrifuge and collect the sucked dust or the like based on the principle of the cyclone, it is possible to efficiently collect the wet dust or the like. As a result, the load on the pump 18E can be reduced. In addition, maintenance such as clogging of the filter of the pump 18E is reduced.

In addition, since the fog is supplied, the amount of polluted water remaining on the road surface is limited. Therefore, the amount of water required for cleaning after work is reduced, and the labor for cleaning is also reduced.

Since the blade cover 14 has a cylindrical shape that matches the shape of the blade 12, the volume of the space inside the blade cover 14 can be reduced, and the dust recovery efficiency can be improved. However, the shape of the blade cover 14 is not limited to this, and the blade cover 14 may be made into a square shape, for example, in order to reduce the manufacturing cost.

Further, although the blade 12 has a spherical shape, the present invention is not limited to this, and the present invention may be applied to a road surface cutting device using a blade having a linear cross section.

The embodiments described above are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. Each element included in the embodiment and its arrangement, material, condition, shape, size, and the like are not limited to those exemplified, and can be appropriately changed.

10 ... Road surface cutting device, 12 ... Blade, 12A ... Front surface, 12B ... Back surface, 12C ... Side surface, 14 ... Blade cover, 14A ... Main body part, 14B ... Fringe part, 14C ... Bellows, 14D ... Stabilization part, 14F ... Connection part , 16 ... spraying means, 16A ... tube, 16B ... pump, 16C ... tube, 16D ... nozzle, 18 ... suction means, 18A ... tube, 18B ... separating means, 18C ... dust collecting box, 18D ... tube, 18E ... pump

Claims (7)

In a road surface cutting device that cuts the road surface by rotating a circular blade,
A cover for providing a space between the road surface and the road surface to accommodate at least a part of the blade during cutting of the road surface.
A spraying means for spraying a liquid into the space and
A suction means for sucking the space and
Equipped with
The cover is
The main body for storing the blade and
A plate-shaped fringe portion provided so as to spread horizontally from the lower end of the main body portion,
During cutting of the road surface by the blade, the frame portion facing the road surface and the frame portion
It is provided with a telescopic portion that is connected to the frame portion and the fringe portion and can be expanded and contracted in a direction perpendicular to the road surface.
A road surface cutting device further comprising a shaft for restricting the horizontal movement of the main body portion with respect to the frame portion by penetrating a through hole fixed to the frame portion and formed in the fringe portion . The blade includes a front surface and a back surface composed of a curved surface, and a plurality of outer peripheral blades provided on the side surface connecting the front surface and the back surface.
The road surface cutting device according to claim 1, wherein the spraying means is configured to supply mist toward the side surface of the blade. The suction means is provided with a centrifugal separation unit that separates the suction material containing the liquid by centrifugal force, and is provided below the centrifugal separation unit in order to discharge a part of the suction material that descends due to the centrifugal force. A claim comprising a separation means in which a lower opening and an upper opening for discharging another part of the suction material that is not discharged from the lower opening to the outside of the centrifuge are formed. Item 2. The road surface cutting device according to Item 1 or 2 . The spraying means includes a nozzle for injecting mist.
The cover is formed with an opening connected to the suction means.
The nozzle is provided only in one region of the space in which the blade is housed by the cover, which includes the axis of rotation and is divided into two by a plane perpendicular to the road surface, and the opening is provided only in the other region. The road surface cutting device according to any one of claims 1 to 3, wherein the road surface cutting device is formed. The road surface cutting device according to any one of claims 1 to 4, wherein the frame portion is not urged against the cover . The blade comprises a front surface and a back surface, and a plurality of outer peripheral blades provided on the side surface connecting the front surface and the back surface.
The spraying means includes a nozzle for injecting mist.
The road surface according to any one of claims 1 to 5, wherein the nozzle is provided at a position outwardly separated from the outer peripheral blade of the blade when the blade is viewed from the surface. Cutting device. In a road surface cutting method for cutting a road surface by rotating the circular blade using the road surface cutting device according to claim 1 .
With at least a part of the blade contained in the space provided between the cover and the road surface, the liquid is sprayed on the space and the blade is rotated while sucking the space to rotate the road surface. A road surface cutting method that includes a step of cutting.

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